Four years after the Deepwater Horizon drilling rig spilled millions of gallons of oil into the Gulf of Mexico, we’re beginning to see the full scope of how this ecological disaster is impacting our wildlife on land, air and sea.

Coral reefs are incredibly diverse ecosystems, but not always cared for as they should be. We took a look at how different coral reefs are managed to see what methods work best, and what places need some work.

Coral reefs can be home to tens of thousands of marine species – and as scientists continue to study these diverse ecosystems, they are finding that our oceans may be home to thousands more species yet to be discovered.